/**
 * Copyright 2011 Joe Choi, All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package swing;

//A listener that can change the L&F of a frame based on the actionCommand of an 
//ActionEvent object. Supported L&Fs are: Mac, Metal, Motif, and Windows. Not all
//L&Fs will be available on a given machine. Notably, the Mac and Windows L&Fs work 
//only on their specific platforms.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class LnFListener implements ActionListener {
Frame frame;
public LnFListener(Frame f) {
 frame = f;
}
public void actionPerformed(ActionEvent e) {
 String lnfName = null;
 if (e.getActionCommand( ).equals("Mac")) {
   lnfName = "com.apple.mrj.swing.MacLookAndFeel";
 } else if (e.getActionCommand( ).equals("Metal")) {
   lnfName = "javax.swing.plaf.metal.MetalLookAndFeel";
 } else if (e.getActionCommand( ).equals("Motif")) {
   lnfName = "com.sun.java.swing.plaf.motif.MotifLookAndFeel";
 } else if (e.getActionCommand( ).equals("Windows")) {
   lnfName = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
 } else {
   System.err.println("Unrecognized L&F request action: " +
     e.getActionCommand( )); 
   return;
 }
 try {
   UIManager.setLookAndFeel(lnfName);
   SwingUtilities.updateComponentTreeUI(frame);
 }
 catch (UnsupportedLookAndFeelException ex1) {
   System.err.println("Unsupported LookAndFeel: " + lnfName);
 }
 catch (ClassNotFoundException ex2) {
   System.err.println("LookAndFeel class not found: " + lnfName);
 }
 catch (InstantiationException ex3) {
   System.err.println("Could not load LookAndFeel: " + lnfName);
 }
 catch (IllegalAccessException ex4) {
   System.err.println("Cannot use LookAndFeel: " + lnfName);
 }
}
}